lovingboth: (Default)
Ian ([personal profile] lovingboth) wrote2009-04-19 02:34 pm
  • Add Memory
  • Share This Entry
  • Current Mood: curious
Entry tags:

An infinite number of correct answers

From a SATS key stage 2 (i.e. for 6-7 year olds) practice question...

[Poll #1386206]
Flat | Top-Level Comments Only

[identity profile] valkyriekaren.livejournal.com 2009-04-19 02:29 pm (UTC)(link)
I've never understood why minus numbers behave that way.

[identity profile] ciphergoth.livejournal.com 2009-04-19 02:37 pm (UTC)(link)
I'll show you next time we're in the same place. The short answer is: draw a graph of -2x against x and it should be clear!

[identity profile] valkyriekaren.livejournal.com 2009-04-19 05:18 pm (UTC)(link)
It's OK, I don't think I really need to know why. Multiplying minus numbers in my head isn't something I need to do regularly, anyway.
Flat | Top-Level Comments Only